Field horsetail

August 7, 2015

Equisetum arvense L.

Life cycle

Perennial spore-producing plant.

Leaves

Not present.

Stems

Vegetative stems are green and branch in whorls. Stems may have a bottle-brush appearance and should not exceed 2 feet in height. Stems die back to the ground in winter.

Field horsetail stalk and vegetative stems
Patch of field horsetail fruiting and vegetative stems.

Flowers and fruit

Erect, unbranched, white to brown fruiting stalks (stems) bear terminal spore-releasing cones. Flowers are not produced.

Field horsetail stalk Field horsetail vegetative stem close-up
Field horsetail fruiting stalk (left). Close-up of vegetative stem of field horsetail (right).

Field horsetail vegetative stem Field horsetail vegetative stem
Field horsetail vegetative stems.

Reproduction

Spores and prolific rhizomes.

Similar weeds

Scouringrush (E. hyemale L.) Differs by having larger evergreen stems with little or no branching. Grows only in wet areas.

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